<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
	</head>
	<body>
		<script type="text/javascript">
			let str = `"abc"`;
			let index1 = str.indexOf('"');
			let index2 = str.lastIndexOf('"');
			let aa = str.slice(index1+1, index2);
			console.log(aa)
			console.log(index2)
			console.log(index1)
			console.log(str)
		</script>
	</body>
</html>
